Battery not charging

Hi
please me dell inspiron is not working since I bought it. The battery is giving me myriad problems. Plugged in and not charging. Last time, I opened the machine itself thinking there was fan inside because it heats a little anytime I switch it on with the adapter. It appeared plugged in and charging but upon closing it, it still reads same as not charging.
Please, guys what should I do to solve this?

Any assistance please?